Ceramic coatings containing layered porosity

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(11)

EP 0 916 635 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	28.02.2001 Bulletin 2001/09

(43)	Date of publication A2:
	19.05.1999 Bulletin 1999/20

(21)	Application number: 98309435.0

(22)	Date of filing: 18.11.1998

(51)	International Patent Classification (IPC)⁷: C04B 38/00, C23C 14/08, B32B 18/00, C23C 28/00, F01D 5/28

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

18.11.1997 US 972589

(71)	Applicant: UNITED TECHNOLOGIES CORPORATION
	Hartford, CT 06101 (US)

(72)	Inventor:
	Maloney, Michael J. Port St. Lucie, Florida 34983 (US)

(74)	Representative: Leckey, David Herbert
	Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)

(54)	Ceramic coatings containing layered porosity

(57) Layered ceramic coatings in which some layers contain porosity as described as are methods for producing such coatings. The different layers have different compositions and/or are applied under different conditions. As applied, some of the layers have a Zone I structure and some have a Zone II/III type structure (as defined by Movchan). Heat treatment can be used to increase the porosity in the Zone I structure layers.

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